The problem here is what was raised before....the optics of having so many lines covering Scarborough.
Well that is why we don't waste funds on things like SELRT or SMLRT. I propose no more than
three new BRT routes through all of Scarborough. BRT along Danforth, the SRT corridor, then adjacent Progress, through Centennial grounds, over the 401, and then on Neilson into Malvern; Markham-McCowan Roads (Markham south of Sheppard, McCowan north of Sheppard into York Region); and one continuously along a 17 km stretch of Kingston Road then to SCC via Ellesmere and Military Tr. All of this would cover from more mileage than those two LRT routes and would total hundreds of millions of dollars less to carpet Scarborough in BRT than even the cost to build just 15 measly kms of SELRT (48kms of new BRT ROW x the int'l average of $6 million/km = $288 million vs. $1030 billion for Sheppard light-rail alone). It may cost more than that given inflation, but still that's remarkably affordable. E-W major arteries would do more than fine with just local/express bus services except Sheppard where there's a legitimate case for subway to continue onwards to Agincourt then south into SCC.
I agree that a Ellesmere-Military Trail BRT would be ideal for Scarborough and Durham. I wonder if it's politically palatable and valuable enough, regionally, to be pushed for. If enough folks on here can agree that the EBRT is politically viable then I think we could throw it on there.
It is not valuable if routed through low-density sprawl (which like up on Sheppard is precisely what the section east of Morningside Ave is). The profitable section is from SCC-UTSC. People want to go the university, to the hospital, to the mall, to job-sites, to civic services, to a major transit hub. Don't think of it as an Ellesmere BRT in isolation. Think of it as composite of a major trunk line from the Beaches to Highland Creek (where transfer to DRT would be possible, right back into the major subway and bus terminal of the borough.
The Eglinton leg of any BRT or LRT is easy to ditch. Just extend whatever is on Eglinton right to Kingston and that'll fix the problem. Nobody in Scarborough needs to go to Kennedy. It's an artifical hub that exists entirely because the subway and SRT terminate there. Change that situation and Kennedy becomes a lot less important.
Ultimately the Eglinton subway could extend beyond OSC eastwards. Why in the meantime would we waste funds to place LRT tracks down the median where they are not needed? Think about it, at no point will a commuter along Eglinton East be no more than 10 minutes away from a station (OSC Stn, Kennedy Stn, Brimley Stn [B-D extension] or Kingston-Eglinton underground BRT interchange facility). The 34 bus in dual local and express operation all-day, can more than accommodate this area's lower ridership levels by contrast to central Eglinton or demand for the airport. Besides any Markham Road BRT line would most likely run east from Kennedy or Brimley Stns so at least that segment of the corridor would be higher-order.